The guys at my local audio shop said that they have put them in 1st gens like mine but I'm waiting on my box that goes behind my rear seats and ride around for a while before I really start considering it if I don't like that.

Edit: The 10w3's are sick, just one will shake the entire truck. I love them. They are extremely versitile subs they sound great even in enclosers that are very small with a little bit of poly-fill.